Every property I have purchased was assessed higher than my purchase price and I appeal every time. 

I bought my first property last year and I received a Notice of Assessment and Taxable Valuation letter about a month ago letting me know that the taxable value of my property is literally about to more than double this year.

@Michael Veal  If you go to the public website of jurisdiction of the home you are interested in you should be able to find find the property tax rate of that jurisdiction and the assessed value of the home.

It's important to check into the finances of the condo owners association to be sure you're not at risk of special assessments. 

You need to share your goals for a new loan with a lender who can help assess the options.With as low as rates are right now, you may be able to shorten your loan term to 15 years and keep a similar (or lower) payment. 

After that, I'd start trying to look at properties with an agent or a wholesaler, assess the deferred maintenance, and start offering...There is tons to learn, but you can't beat hands on experience.

Special assessment had to be made to pay them which ran six months behind.

You could also have provided other documents to help a buyer assess the potential financials of the deal.You are always in control of what YOU do, and NEVER in control of what others do.

@Susan TanYou also need to find out what special assessments they have charged in recent history and what the financial health of the HOA budget looks like.

When the tenant gives you the "official" notice, ask for a look-see to assess how much you need to do and start advertising it as soon as you can with the caveat it'll be available 1 XXX 2020.